An international group of astrophysicists including Museum Curator Mordecai-Mark Mac Low has found evidence strongly supporting a solution to a long-standing puzzle about the birth of some of the most massive stars in the universe.

A series of papers recently published by scientists at the American Museum of Natural History suggests that polar bears in the warming Arctic are turning to alternate food sources. As Arctic sea ice melts earlier and freezes later each year, polar bears have a limited amount of time to hunt their historically preferred prey—ringed seal pups—and must spend more time on land.

Was Napoleon Bonaparte poisoned? This question has plagued historians since the defeated French emperor’s death on May 5, 1821, on the island of St. Helena in the South Atlantic, where he lived in exile for nearly six years.